Seat headrest, seat, and vehicle

Abstract

The embodiment of the application relates to the technical field of vehicle accessories, in particular to a seat headrest, a seat and a vehicle. The seat headrest comprises a headrest main body, first and second accommodating grooves arranged on opposite sides of the headrest main body, a winding mechanism fixed in the first accommodating groove, a limiting mechanism fixed in the second accommodating groove, a restraint belt with one end connected to the winding mechanism and the other end provided with a handle, and the handle is switchably arranged in a first position and a second position. When the handle is in the first position, it is at least partially exposed outside the first accommodating groove, and the restraint belt is wound and accommodated in the first accommodating groove by the winding mechanism. When the handle is in the second position, it is limited and matched with the limiting mechanism, so that the restraint belt surrounds the headrest main body to jointly form a restraint space with the headrest main body. The convenient conversion between the restraint belt hidden in the first accommodating groove and the restraint belt surrounding the headrest main body to restrain the head of a passenger is realized, the integrity of the appearance of the headrest is improved, and the head of the passenger is prevented from being affected when leaning against the headrest while driving.

Description

Technical Field

[0001] This invention relates to the field of vehicle parts technology, specifically to headrests, seats, and vehicles. Background Technology

[0002] As the application scenarios of intelligent car seats continue to expand, headrests, as essential components, are being given more functions in addition to protecting occupants' heads and reducing injuries. During driving, to provide sufficient head protection, headrest surfaces are mostly designed with a convex or flat structure. However, when the vehicle is safely parked and occupants need to lie down to rest, the limitations of the headrest surface mean that the sides cannot provide effective support, causing the occupant's head to easily slide to the sides, making it difficult to relax freely and failing to meet the occupant's need for a more comfortable rest.

[0003] Current technologies typically involve attaching a strap to the front of the headrest to restrain the head; however, this method significantly impacts the headrest's appearance, and when normal driving resumes and head restraint is no longer required, the strap interferes with the occupant's ability to rest their head against the headrest, affecting comfort. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of this application is to provide a seat headrest, seat and vehicle, which aims to solve the problem that when the front end of the headrest is fixed with a strap, it has a significant impact on the appearance of the headrest and affects the comfort of the passenger's head when leaning against the headrest during normal driving.

[0005] In a first aspect, embodiments of this application provide a seat headrest, comprising: The headrest body has a first receiving groove and a second receiving groove on opposite sides; The winding mechanism is fixed inside the first receiving groove; The limiting mechanism is fixed inside the second receiving groove; The constraint strap is connected to the winding mechanism at one end and has a handle at the other end, which can be switched to a first position and a second position. When the handle is in the first position, it is at least partially exposed outside the first receiving groove, and the constraint band is wound and stored in the first receiving groove by the winding mechanism; When the handle is in the second position, it engages with the limiting mechanism to limit the movement of the restraint strap around the headrest body, thereby forming a restraint space together with the headrest body.

[0006] The headrest provided in this application features a first and a second receiving groove on each side of the headrest body. A winding mechanism is fixed in the first receiving groove, and a limiting mechanism is fixed in the second receiving groove. One end of the restraint strap is connected to the winding mechanism, and the other end has a handle. When resting in the vehicle, the occupant can pull the handle to switch it to a second position, causing the restraint strap to wrap around the headrest body to form a restraint space for the occupant's head. This allows the headrest body and the restraint strap to jointly restrain the occupant's head, enabling the occupant to relax freely and improving comfort and postural stability during rest. During normal driving, the handle is in the first position, with the restraint strap wound and stored in the first receiving groove. Only part of the handle is exposed, without affecting the original appearance of the headrest or the comfort of the occupant's head. By switching the handle between the first and second positions, a convenient transition can be achieved between the restraint strap being hidden in the first receiving groove and the strap working around the headrest body. This eliminates the need to fix the strap at the front of the headrest, improving the integrity of the headrest's appearance and preventing interference with the occupant's head support during normal driving.

[0007] In some embodiments, the winding mechanism includes a winding portion, a fixing portion, and an elastic element; The fixing part is fixedly connected to the headrest body, the winding part is rotatably disposed on the fixing part, and the elastic element is connected between the winding part and the fixing part; The end of the constraint band is fixedly connected to the winding part, and the winding part rotates relative to the fixed part to wind and unwind the constraint band; The elastic element is configured to drive the winding portion to wind the constraint band by elastic potential energy, and to position the handle in the first position.

[0008] The winding mechanism, through the cooperation of the winding part, the fixing part and the elastic element, enables the handle to be stably held in the first position when no force is applied, and after the handle is disengaged from the limiting mechanism, the winding part can automatically wind the constraint strip under the elastic force of the elastic element, so that the handle can automatically return to the first position.

[0009] In some embodiments, the fixing part includes a first connector and a second connector; The first connector and the second connector are rotatably connected to both ends of the winding part, and both the first connector and the second connector are fixedly connected to the headrest body. One end of the elastic element is fixedly connected to the winding portion, and the other end is fixedly connected to the first connector or the second connector; The winding section includes a winding sleeve, a first bearing seat, and a second bearing seat. The first bearing seat and the second bearing seat are respectively fixed to both ends of the roller sleeve. The first connecting piece is rotatably connected to the first bearing seat, and the second connecting piece is rotatably connected to the second bearing seat. The elastic element is disposed inside the roller sleeve; One end of the elastic element is connected to the second bearing seat and the other end is connected to the first connecting member, or one end of the elastic element is connected to the first bearing seat and the other end is connected to the second connecting member.

[0010] In some embodiments, the limiting mechanism includes a housing, on which a first groove and a second groove are arranged longitudinally and communicate with each other; The handle includes a locking part, which is connected to the restraint strap; The snap-fit ​​portion passes through the first groove and then snaps into the second groove.

[0011] In some embodiments, both the first groove and the second groove are provided with slots that penetrate one side of the housing. The lateral dimension of the slot of the second groove is smaller than the lateral dimension of the snap-fit ​​part. The snap-fit ​​part is placed in the second groove through the slot of the first groove and snaps into the slot of the second groove. And / or, the limiting mechanism further includes a limiting piece and a limiting spring located in the first groove, the limiting piece being slidably connected in the first groove, the limiting spring being connected between the limiting piece and the housing, the engaging part being placed in the first groove to push the limiting piece to compress the limiting spring, and the engaging part being able to move to the second groove and engage with the second groove under the action of the limiting spring.

[0012] In some embodiments, a power supply base and a flexible conductive element are also included; The power supply base is provided with at least one power supply interface that can supply power to external devices. Both the power supply base and the flexible conductive element are fixed on the constraint band, and the flexible conductive element can be wound around the constraint band. The handle is provided with an electrical connector, and the flexible conductive element is electrically connected to the electrical connector and the power supply base.

[0013] In some embodiments, the limiting mechanism is provided with a power supply component, and when the handle is engaged with the limiting mechanism, the power supply component is electrically connected to the electrical connector. And / or, the constraint band is provided with a plurality of mounting pieces for connecting the external device, and at least two of the mounting pieces are located on both sides of the power supply base along the extension direction of the constraint band.

[0014] In some embodiments, the headrest body includes a skeleton and a support, a portion of the skeleton is disposed within the support, the first receiving groove and the second receiving groove are both disposed on the support and located on both sides of the skeleton, and the first receiving groove and the second receiving groove both extend to the skeleton; Both the limiting mechanism and the winding mechanism are fixedly connected to the skeleton component.

[0015] Secondly, embodiments of this application provide a seat, including a seat cushion, a backrest, and a headrest as described in any of the preceding claims, wherein the backrest is connected to the seat cushion and the headrest body is connected to the backrest.

[0016] Thirdly, embodiments of this application provide a vehicle, including a vehicle body and seats as described above. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the background art, the accompanying drawings used in the embodiments of this application will be described below.

[0018] Figure 1 This is a schematic diagram of the vehicle structure disclosed in the embodiments of this application; Figure 2 This is a schematic diagram of the structure of the seat disclosed in the embodiments of this application; Figure 3 This is a schematic diagram of the structure of the seat headrest in the first position as disclosed in the embodiments of this application; Figure 4 This is a schematic diagram of the structure of the seat headrest when the handle is in the second position, as disclosed in the embodiments of this application; Figure 5 This is an exploded view of the seat headrest disclosed in the embodiments of this application; Figure 6 This is a schematic diagram of the internal structure of the seat headrest when the handle is in the first position, as disclosed in the embodiments of this application; Figure 7 This is a schematic diagram of the internal structure of the seat headrest when the handle is in the second position, as disclosed in an embodiment of this application; Figure 8 This is an exploded view of the winding mechanism and mounting bracket disclosed in the embodiments of this application; Figure 9 This is an exploded view of the winding mechanism disclosed in the embodiments of this application; Figure 10 This is an exploded view of the limiting mechanism disclosed in the embodiments of this application; Figure 11 This is a cross-sectional view of the locking mechanism of the snap-fit ​​portion in the first groove as disclosed in the embodiments of this application; Figure 12This is a cross-sectional view of the locking mechanism of the snap-fit ​​portion in the second groove as disclosed in the embodiments of this application.

[0019] Explanation of reference numerals in the attached figures: 1-Headrest body; 11-First receiving groove; 12-Frame component; 13-Support component; 131-Skin; 14-Mounting bracket; 141-Connecting plate; 142-First snap-fit ​​hole; 143-Second snap-fit ​​hole; 144-Limiting notch; 15-Guide plate; 2-Winding mechanism; 21-Winding part; 211-Roll sleeve; 212-First bearing seat; 213-Second bearing seat; 221-First connecting component; 222-Second connecting component; 23-Elastic component; 241-First bracket; 242-First... 243-Extension; 251-First protrusion; 252-Second protrusion; 26-Stabilizing ring; 3-Limiting mechanism; 31-Housing shell; 32-First groove; 33-Second groove; 34-Limiting piece; 35-Limiting spring; 36-Power supply component; 4-Constraint strap; 41-Handle; 411-Snap-fit ​​part; 42-Power supply base; 421-Power supply interface; 43-Flexible conductive component; 44-Electrical connector; 45-Plug-in slot; 46-Mounting component; 51-Seat cushion; 52-Backrest; 6-Vehicle body. Detailed Implementation

[0020] The terms "first," "second," etc., are used for descriptive purposes only and have no sequential or technical meaning, nor should they be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Directional terms used in this application, such as "upper," "lower," "front," "rear," "left," "right," "inner," and "outer," are merely for reference to the orientation shown in the accompanying drawings. The use of directional terms is for better and clearer explanation and understanding of this application, and does not indicate the orientation of the referred device or component in an actual application scenario.

[0021] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. "Fixed connection" refers to a connection where the relative positional relationship remains unchanged after connection. "Rotary connection" refers to a connection where the two parts can rotate relative to each other after connection. "Sliding connection" refers to a connection where the two parts can slide relative to each other after connection.

[0022] The term "electrical connection" refers to the flow of current or signal from one conductor to another. An electrical connection between A and B means that current or signal can flow from A to B and vice versa. This connection includes direct and indirect electrical connections. A direct electrical connection between A and B means that A and B are physically connected. An indirect electrical connection between A and B means that A and B are connected via C, where C can be at least one wire or device.

[0023] The embodiments of this application are described below with reference to the accompanying drawings.

[0024] Please see Figure 1 , Figure 1 This is a schematic diagram of the vehicle structure disclosed in the embodiments of this application. The vehicle can be, but is not limited to, a pure electric vehicle (PEV / BEV), a hybrid electric vehicle (HEV), a range-extended electric vehicle (REEV), a plug-in hybrid electric vehicle (PHEV), or a new energy vehicle.

[0025] In this embodiment, the vehicle includes a vehicle body 6 and a seat, with a headrest provided on the seat. The seat is fixed inside the vehicle body 6, and the headrest is fixed to the top of the seat back. The seat is for occupants to sit on, and the headrest is located at the head position of the occupant in the seat to support the occupant's head.

[0026] Please see Figure 2 , Figure 2 This is a schematic diagram of the structure of the seat disclosed in the embodiments of this application. The seat includes a seat cushion 51, a backrest 52 and a headrest. The backrest 52 is connected to the top of the seat cushion 51 and the headrest is fixed to the top of the backrest 52. The seat cushion 51 is used to support the occupant's buttocks and thighs, the backrest 52 is used to support the occupant's back, and the headrest is used to support the occupant's head.

[0027] Please see Figures 3 to 12 , Figure 3This is a schematic diagram of the structure of a seat headrest disclosed in the first aspect of this application. The seat headrest includes a headrest body 1, a winding mechanism 2, a limiting mechanism 3, and a restraint strap 4. The headrest body 1 has a first receiving groove 11 and a second receiving groove on opposite sides. The winding mechanism 2 is fixed within the first receiving groove 11; the limiting mechanism 3 is fixed within the second receiving groove; one end of the restraint strap 4 is connected to the winding mechanism 2, and the other end has a handle 41, which can be switched between a first position and a second position. In the first position, the handle 41 is at least partially exposed outside the first receiving groove 11, and the restraint strap 4 is wound and stored within the first receiving groove 11 by the winding mechanism 2; in the second position, the handle 41 engages with the limiting mechanism 3 to limit and position the restraint strap 4 around the headrest body 1, thus forming a restraint space together with the headrest body 1.

[0028] The headrest provided in this application features a first receiving groove 11 and a second receiving groove on both sides of the headrest body 1. A winding mechanism 2 is fixed in the first receiving groove 11, and a limiting mechanism 3 is fixed in the second receiving groove. One end of a restraint strap 4 is connected to the winding mechanism 2, and the other end has a handle 41. When resting in the vehicle, the occupant can pull the handle 41 to switch it to a second position, causing the restraint strap 4 to wrap around the headrest body 1 to form a restraint space for the occupant's head. This allows the headrest body 1 and the restraint strap 4 to jointly restrain the occupant's head, enabling the occupant to relax freely and improving comfort and postural stability during rest. During normal driving, the handle 41 is in the first position, with the restraint strap 4 wound and stored in the first receiving groove 11. Only part of the handle 41 is exposed, without affecting the original appearance of the headrest or the comfort of the occupant's head. By switching between the first and second positions using the handle 41, a convenient transition can be achieved between the storage state where the restraint strap 4 is hidden in the first receiving slot 11 and the working state surrounding the headrest body 1. This eliminates the need to fix the strap at the front of the headrest, which not only improves the integrity of the headrest's appearance but also avoids affecting the occupant's head support when leaning against the headrest during normal driving.

[0029] The headrest body 1 has a front support surface facing the occupant's head and a rear surface facing away from the occupant, with a cross-section that is approximately rectangular or an ergonomically designed curved profile. A first receiving groove 11 and a second receiving groove are machined on opposite sides of the headrest body 1. The first receiving groove 11 and the second receiving groove are located on the left and right sides of the headrest body 1, respectively. Both the first receiving groove 11 and the second receiving groove are recessed groove structures formed by indentations on the surface of the headrest body 1, with their openings located on the left and right sides of the headrest body 1. The first receiving groove 11 and the second receiving groove provide receiving space on the left and right sides of the headrest body 1, without disrupting the overall shape of the front and rear surfaces of the headrest body 1. Under normal driving conditions, the front surface of the headrest body 1 can still maintain its convex or flat profile to provide normal head contact and collision protection functions.

[0030] Furthermore, refer to Figures 3 to 7 As shown, in some embodiments, the headrest body 1 includes a skeleton 12 and a support 13. A portion of the skeleton 12 is disposed within the support 13. A first receiving groove 11 and a second receiving groove are disposed on the support 13 and located on both sides of the skeleton 12. Both the first receiving groove 11 and the second receiving groove extend to the skeleton 12. The limiting mechanism 3 and the winding mechanism 2 are both fixedly connected to the skeleton 12.

[0031] With this configuration, the skeleton 12 bears the tension transmitted by the restraint belt 4 through the winding mechanism 2 and the limiting mechanism 3, making the structure stable. The support 13 is mainly responsible for buffering and appearance, and is not prone to failure due to deformation under stress.

[0032] The frame member 12 is a rigid structure, which can be welded from metal tubing or sheet metal, and is used to connect the backrest of the seat. The frame member 12 may include two vertically arranged longitudinal bars and a transverse bar connecting the two longitudinal bars, so that the frame member 12 has a U-shaped structure.

[0033] The support member 13 is a block structure and can be made of flexible materials, such as polyurethane foam, so that it can support the shape of the headrest body 1 and provide a soft touch. The support member 13 has grooves on opposite sides in the lateral direction, which serve as a first receiving groove 11 and a second receiving groove. The support member 13 is set to wrap around the skeleton member 12. The first receiving groove 11 and the second receiving groove are located on both sides of the skeleton member 12 and extend to the skeleton member 12, so that the winding mechanism 2 and the limiting mechanism 3 can be fixed on the skeleton member 12.

[0034] The support member 13 is provided with a transverse through groove. The middle part of the through groove has an installation port on the bottom surface of the support member 13. The skeleton member 12 passes through the installation port and enters the through groove. The part of the through groove on both sides of the skeleton member 12 forms a first receiving groove 11 and a second receiving groove, respectively. The winding mechanism 2 and the limiting mechanism 3 are respectively provided at both ends of the through groove, and both can be fixedly connected to the skeleton member 12 in the through groove.

[0035] The outer side of the support member 13 may be covered with a skin 131, and the skin 131 is provided with two clearance openings, which are respectively arranged opposite to the opening of the first receiving groove 11 and the opening of the second receiving groove.

[0036] Reference Figures 3 to 8 As shown, in some embodiments, the winding mechanism 2 is fixed to the skeleton member 12 by a mounting bracket 14; the mounting bracket 14 includes two connecting plates 141 spaced apart in the longitudinal direction, and the two ends of the winding mechanism 2 are respectively provided with a first bracket 241 and a second bracket 242, the first bracket 241 is snapped into one of the connecting plates 141, and the second bracket 242 is snapped into the other connecting plate 141.

[0037] With this configuration, the winding mechanism 2 can be quickly assembled and disassembled on the skeleton 12 by engaging the two connecting plates 141 on the mounting bracket 14 with the first bracket 241 and the second bracket 242 on the winding mechanism 2, which facilitates assembly and maintenance.

[0038] The mounting bracket 14 includes two connecting plates 141 spaced apart along the longitudinal direction. The two connecting plates 141 can be two opposing plate structures bent from a base plate, or the two connecting plates 141 can be two lug structures extending from the skeleton member 12.

[0039] The first bracket 241 and the second bracket 242 can be fixed to both ends of the winding mechanism 2 by welding or bolting. The first bracket 241 and the second bracket 242 are respectively snapped into the two connecting plates 141. The snapping method can be through elastic buckles, protrusions and holes, etc. During installation, simply place the winding mechanism 2 between the two connecting plates 141, and let the first bracket 241 and the second bracket 242 snap into the corresponding connecting plates 141 to complete the fixation. The operation is simple and the assembly is convenient.

[0040] Furthermore, in some embodiments, one of the connecting plates 141 is provided with a first snap-fit ​​hole 142, and the other connecting plate 141 is provided with a second snap-fit ​​hole 143 and a limiting notch 144; the first bracket 241 is provided with a first protrusion 251, which snaps into the first snap-fit ​​hole 142; the second bracket 242 has an extension portion 243 extending toward the connecting plate 141, and the extension portion 243 is provided with a second protrusion 252; the second bracket 242 snaps into the limiting notch 144, and the second protrusion 252 snaps into the second snap-fit ​​hole 143.

[0041] With this configuration, the first protrusion 251 engages with the first snap-fit ​​hole 142, the second protrusion 252 engages with the second snap-fit ​​hole 143, and the limiting notch 144 engages with the first snap-fit ​​hole 142. This creates multiple connection points between the winding mechanism 2 and the mounting bracket 14, ensuring that the winding mechanism 2 is stably confined between the two connecting plates 141, thus preventing the winding mechanism 2 from detaching from the mounting bracket 14 due to vibration.

[0042] A connecting plate 141 may have a semi-circular through hole as a first snap-fit ​​hole 142. The cross-section of the first protrusion 251 is semi-circular to fit the first snap-fit ​​hole 142, and after the first protrusion 251 is snapped into the first snap-fit ​​hole 142, the first protrusion 251 cannot rotate within the first snap-fit ​​hole 142. Alternatively, the first snap-fit ​​hole 142 may have other shapes, and the shape of the first protrusion 251 may be adapted to the first snap-fit ​​hole 142.

[0043] Another connecting plate 141 is provided with a second snap-fit ​​hole 143 and a limiting notch 144. The limiting notch 144 can be a rectangular notch. The side of the second bracket 242 facing the mounting bracket 14 can be provided with a groove structure. After the second bracket 242 is snapped into the limiting notch 144, the connecting plates 141 on both sides of the limiting notch 144 can enter the groove structure, so that the second bracket 242 and the connecting plate 141 form a limiting fit.

[0044] The extension 243 can be a plate structure on the second bracket 242, with a second protrusion 252 on the plate structure. After the second bracket 242 is engaged with the limiting notch 144, the extension 243 can be located on the side of the connecting plate 141 facing away from the other connecting plate 141. The second protrusion 252 is engaged with the second snap-fit ​​hole 143 to restrict the movement of the second bracket 242 relative to the connecting plate 141. Alternatively, after the second bracket 242 is engaged with the limiting notch 144, the extension 243 is located on the side of the connecting plate 141 facing the other connecting plate 141.

[0045] When the winding mechanism 2 is installed on the mounting bracket 14, the winding mechanism 2 is engaged between the two connecting plates 141.

[0046] When the winding mechanism 2 is installed on the mounting bracket 14, the first bracket 241 is first moved to the connecting plate 141 with the first snap-fit ​​hole 142, and the first protrusion 251 is snapped into the first snap-fit ​​hole 142. Then the second bracket 242 is moved toward the connecting plate 141 with the second snap-fit ​​hole 143, so that the second bracket 242 is snapped into the limiting notch 144, and the extension 243 is moved to the second snap-fit ​​hole 143, so that the second protrusion 252 is snapped into the second snap-fit ​​hole 143.

[0047] The winding mechanism 2 is housed and fixed within the first receiving groove 11. The winding mechanism 2 has a rotatable shaft structure inside, allowing the constraint band 4 to be wound around or loosened when the shaft structure rotates. The constraint band 4 can be fixed to the winding mechanism 2 by adhesive or bolts, or by crimping.

[0048] Furthermore, refer to Figure 9 As shown, in some embodiments, the winding mechanism 2 includes a winding portion 21, a fixing portion, and an elastic element 23; the fixing portion is fixedly connected to the headrest body 1, the winding portion 21 is rotatably disposed on the fixing portion, and the elastic element 23 is connected between the winding portion 21 and the fixing portion; the end of the constraint band 4 is fixedly connected to the winding portion 21, and the winding portion 21 rotates relative to the fixing portion to wind and unwind the constraint band 4; the elastic element 23 is configured to drive the winding portion 21 to wind the constraint band 4 through elastic potential energy and to place the handle 41 in a first position.

[0049] With this configuration, the winding mechanism 2, through the cooperation of the winding part 21, the fixing part and the elastic element 23, ensures that the handle 41 can be stably maintained in the first position when there is no external force. After the handle 41 is disengaged from the limiting mechanism 3, the winding part 21 can automatically wind the constraint band 4 under the elastic force of the elastic element 23, so that the handle 41 can automatically return to the first position.

[0050] The fixing part is used to fix the entire winding mechanism 2 to the headrest body 1. The fixing part can be a bracket or a block structure. The fixing part can be fixed to the headrest body 1 by bolts or adhesive. When the headrest body 1 has a skeleton 12, the fixing part can be welded to the skeleton 12, or the fixing part can be detachably connected to the mounting bracket 14 on the skeleton 12.

[0051] The winding portion 21 can be a cylindrical reel structure, with its outer circumferential surface used to contact the constraint band 4. The end of the constraint band 4 is fixedly connected to the winding portion 21. The fixing method can be that the winding portion 21 has an axially extending groove, and the end of the constraint band 4 is inserted into the groove and locked by a transverse pin or screw, or it can be fixed by adhesive. When the winding portion 21 rotates relative to the fixed portion in one direction, the constraint band 4 will continuously wrap around the outer circumferential surface of the winding portion 21 to achieve winding; when rotating in the opposite direction, the constraint band 4 is unwound from the winding portion 21 to achieve relaxation.

[0052] The elastic element 23 connects the winding part 21 and the fixing part, and can transmit elastic force between the winding part 21 and the fixing part. The elastic element 23 can be a coil spring, torsion spring or helical spring. In the assembled state, the elastic element 23 stores a certain amount of elastic potential energy, which generates a torque or force. This torque or force acts on the winding part 21, causing the winding part 21 to rotate and wind the constraint band 4, so that the constraint band 4 tends to be continuously drawn into the first receiving groove 11. When the occupant pulls the handle 41 to pull the constraint band 4 outward, the winding part 21 overcomes the elastic force of the elastic element 23 and rotates, thereby loosening the constraint band 4 and causing the constraint band 4 to stretch. At this time, the deformation of the elastic element 23 increases, and the elastic potential energy is further stored. When the handle 41 is released from the limiting mechanism 3, the elastic element 23 releases the stored elastic potential energy, drives the winding part 21 to rotate in the opposite direction, thereby automatically winding and retracting the constraint band 4, and finally driving the handle 41 back to the first position.

[0053] Furthermore, in some embodiments, the fixing part includes a first connector 221 and a second connector 222; the first connector 221 and the second connector 222 are respectively rotatably connected to the two ends of the winding part 21, and both the first connector 221 and the second connector 222 are fixedly connected to the headrest body 1; one end of the elastic member 23 is fixedly connected to the winding part 21, and the other end is fixedly connected to the first connector 221 or the second connector 222.

[0054] With this configuration, the first connector 221 and the second connector 222 are rotatably connected to both ends of the winding part 21, forming a rotating structure supported at both ends, which improves the stability of the winding part 21 during rotation and avoids swaying caused by force on one end.

[0055] The first connector 221 and the second connector 222 are independently formed components. One end of the winding part 21 is rotatably supported on the first connector 221, and the other end is rotatably supported on the second connector 222. Both the first connector 221 and the second connector 222 are fixedly connected to the headrest body 1, thereby securely installing the entire winding mechanism 2 inside the headrest body 1.

[0056] Reference Figure 9 As shown, the first bracket 241 can be fixed to the second connector 222, and the second bracket 242 can be fixed to the first connector 221, thereby allowing the first connector 221 and the second connector 222 to be detachably connected to the mounting bracket 14 via the first bracket 241 and the second bracket 242. Alternatively, the first bracket 241 can be fixed to the first connector 221, and the second bracket 242 can be fixed to the second connector 222, thereby allowing the first connector 221 and the second connector 222 to be detachably connected to the mounting bracket 14 via the first bracket 241 and the second bracket 242.

[0057] The first connector 221 and the second connector 222 can also be fixed to the headrest body 1 by welding or bolting. Alternatively, the first connector 221 and the second connector 222 can be pre-embedded in the headrest body 1.

[0058] One end of the elastic element 23 is fixedly connected to the winding portion 21, and the other end can be fixedly connected to the first connector 221, or one end of the elastic element 23 is fixedly connected to the winding portion 21, and the other end is fixedly connected to the second connector 222. When the elastic element 23 stores or releases energy, its elastic force acts directly between the winding portion 21 and the fixed portion. When the constraint band 4 is pulled out, the winding portion 21 rotates relative to the first connector 221 and the second connector 222, and the elastic element 23 is further torsional deformed, storing elastic potential energy; when the external force is removed, the rebound force of the elastic element 23 is applied to the fixed portion and the winding portion 21 to drive the winding portion 21 to reverse, realizing the operation of winding the constraint band 4.

[0059] Furthermore, in some embodiments, the winding section 21 includes a winding sleeve 211, a first bearing seat 212, and a second bearing seat 213; the first bearing seat 212 and the second bearing seat 213 are respectively fixed to both ends of the winding sleeve 211, the first connecting member 221 is rotatably connected to the first bearing seat 212, and the second connecting member 222 is rotatably connected to the second bearing seat 213; the elastic member 23 is disposed inside the winding sleeve 211; one end of the elastic member 23 is connected to the second bearing seat 213, and the other end is connected to the first connecting member 221, or one end of the elastic member 23 is connected to the first bearing seat 212, and the other end is connected to the second connecting member 222.

[0060] With this configuration, the elastic element 23 is housed within the reel sleeve 211, resulting in a compact structure that does not occupy external space. Furthermore, the reel sleeve 211 provides protection and restraint for the elastic element 23. The first bearing seat 212 and the second bearing seat 213 are used to seal both ends of the reel sleeve 211, preventing foreign objects from contacting the elastic element 23.

[0061] The reel sleeve 211 is a hollow tubular component, which can be made of metal or high-strength plastic. The outer circumferential surface of the reel sleeve 211 is used to wrap the restraint band 4.

[0062] The first bearing seat 212 and the second bearing seat 213 are respectively fixed to both ends of the reel sleeve 211. The fixing method can be interference fit, welding or bonding. Alternatively, both ends of the reel sleeve 211 are provided with limiting grooves, and both the first bearing seat 212 and the second bearing seat 213 are provided with limiting protrusions. The first bearing seat 212 is inserted into one end of the reel sleeve 211, and the limiting protrusion of the first bearing seat 212 is engaged with the limiting groove at the corresponding end of the reel sleeve 211, thereby restricting the rotation of the first bearing seat 212 relative to the reel sleeve 211; the second bearing seat 213 is inserted into the other end of the reel sleeve 211, and the limiting protrusion of the second bearing seat 213 is engaged with the limiting groove at the corresponding end of the reel sleeve 211, thereby restricting the rotation of the second bearing seat 213 relative to the reel sleeve 211.

[0063] The elastic element 23 is integrally disposed within the internal space of the roll sleeve 211. One end of the elastic element 23 is fixedly connected to the second bearing seat 213 by welding or bolting, and the other end is fixedly connected to the first connecting member 221 by welding or bolting. Both the first connecting member 221 and the second connecting member 222 are stationary relative to the headrest body 1, and the second bearing seat 213 rotates together with the roll sleeve 211, so that the elastic element 23 can undergo elastic deformation when the roll sleeve 211 rotates.

[0064] Furthermore, in some embodiments, the winding portion 21 further includes a stabilizing ring 26, and the elastic element 23 includes a compression spring; the compression spring extends axially along the winding sleeve 211, and the stabilizing ring 26 is disposed inside the winding sleeve 211 and sleeved on the compression spring.

[0065] With this configuration, the stabilizing ring 26 is fitted onto the compression spring, which can limit the radial deformation of the compression spring, improve the stability of the elastic element 23 working inside the roll sleeve 211, and prevent the compression spring from contacting the inner wall of the roll sleeve 211 when it deforms.

[0066] The stabilizing ring 26 can be a thin-walled metal ring or a plastic bushing, with an inner diameter slightly larger than the outer diameter of the compression spring. Its outer diameter slides against or maintains a clearance with the inner wall of the reel sleeve 211, allowing the stabilizing ring 26 to slide slightly within the sleeve without obstructing the spring's extension and retraction. The axial length of the stabilizing ring 26 can cover most of the axial range of the compression spring, or the axial length of the stabilizing ring 26 can be less than the axial length of the compression spring.

[0067] The compression spring extends axially along the coil sleeve 211, with one end fixed to the end face of the second bearing seat 213 and the other end fixed to the end face of the first connector 221. The compression spring can be fixedly connected to the second bearing seat 213 and the first connector 221 by welding or bolting.

[0068] When the compression spring is axially compressed or stretched, it may have a tendency to bend radially. The stabilizing ring 26, by constraining the outer periphery of the compression spring, can prevent the spring from radially instability, bending or rubbing against the inner wall of the sleeve 211, and ensure that the elastic force is smoothly transmitted axially.

[0069] The limiting mechanism 3 is fully accommodated and fixed within the second receiving groove. The surface of the limiting mechanism 3 facing the outer side of the headrest body 1 may be provided with a recessed structure or a snap-fit ​​structure that cooperates with the handle 41 to achieve a separable limiting engagement.

[0070] The restraint strap 4 is made of a flexible strip material, such as woven nylon or polyester fiber, and can withstand a certain amount of tension and be repeatedly bent and wound. One end of the restraint strap 4 is connected to the winding mechanism 2, specifically by passing the end of the strap through a slot on the reel and then sewing it in place or by pressing it tightly with a pressure plate. The other end of the restraint strap 4 is provided with a handle 41, which is a relatively rigid component. The shape and size of the handle 41 are designed to facilitate the occupant to grip and apply force with their fingers.

[0071] Furthermore, refer to Figure 10As shown, in some embodiments, the limiting mechanism 3 includes a housing 31, on which a first groove 32 and a second groove 33 are provided in a longitudinal direction and communicate with each other; the handle 41 includes a snap-fit ​​part 411, which is connected to the constraint strap 4; the snap-fit ​​part 411 passes through the first groove 32 and snaps into the second groove 33.

[0072] With this configuration, the first groove 32 and the second groove 33 are connected on the housing 31 and cooperate with the snap-fit ​​part 411 on the handle 41, so that the handle 41 can be easily snapped into or out of the second groove 33 by sliding after entering the first groove 32, making the operation simple.

[0073] The housing 31 has a first groove 32 and a second groove 33 arranged longitudinally and communicating with each other. The first groove 32 and the second groove 33 open on the exposed surface of the housing 31. The longitudinal direction can be understood as the direction approximately along the height of the headrest body 1 after it is installed on the seat. The first groove 32 and the second groove 33 are arranged sequentially in the longitudinal direction and their internal spaces are interconnected.

[0074] The handle 41 includes a locking part 411, which is connected to the restraint strap 4. The locking part 411 can be formed by extending from the body of the handle 41, or it can be manufactured separately and fixed to the handle 41.

[0075] When the handle 41 is pulled from the first position and approaches the limiting mechanism 3, the engaging part 411 is first aligned and passes through the first groove 32, placing it inside the housing 31. Then, the engaging part 411 is moved longitudinally to the second groove 33. A partial structure of the engaging part 411 engages with the groove wall or opening of the second groove 33, preventing the engaging part 411 from directly disengaging from the second groove 33, thus achieving engaging and limiting engagement. At this time, the handle 41 is in the second position. When release is required, the occupant can reverse the operation, moving the engaging part 411 from the second groove 33 back to the first groove 32, and then withdrawing it from the first groove 32 to release the limiting engagement.

[0076] In some embodiments, the first groove 32 and the second groove 33 are both provided with slots that penetrate one side of the housing 31. The lateral dimension of the slot of the second groove 33 is smaller than the lateral dimension of the snap-fit ​​part 411. The snap-fit ​​part 411 is placed in the second groove 33 through the slot of the first groove 32 and snaps into the slot of the second groove 33.

[0077] With this configuration, the locking effect is achieved by using the size difference between the slot of the second groove 33 and the snap-fit ​​part 411 through a simple lateral stop, which makes the structure of the housing 31 simple, the manufacturing cost low and the limiting effect stable.

[0078] The openings of the first groove 32 and the second groove 33 are both located on the same side surface of the shell 31. The lateral direction can be understood as the direction perpendicular to the longitudinal direction and along the left and right direction of the headrest, that is, the lateral direction can be the width direction of the headrest.

[0079] When the engaging part 411 enters the interior of the housing 31 through the opening of the first groove 32 and moves longitudinally to the area where the second groove 33 is located, the engaging part 411 is located in the internal space of the second groove 33. The lateral dimension of the engaging part 411 is larger than the lateral dimension of the opening of the second groove 33, so the engaging part 411 cannot be dislodged through the opening of the second groove 33. At this time, the tension of the restraining strap 4 acts on the handle 41, and the engaging part 411 abuts against the inner wall of the opening of the second groove 33, forming a stable engagement.

[0080] When the occupant releases the limit, he must push the handle 41 longitudinally toward the first groove 32 so that the locking part 411 is released from the restriction of the second groove 33, and then take out the locking part 411 through the wide slot of the first groove 32.

[0081] Alternatively, the second groove 33 is located on one side of the longitudinal groove wall of the first groove 32, and the locking part 411 is an L-shaped block structure. After the locking part 411 enters the first groove 32, it moves toward the second groove 33, so that the rod part of the L-shaped block structure is inserted into the second groove 33, thereby realizing the locking part 411 and the second groove 33.

[0082] Furthermore, in some embodiments, the limiting mechanism 3 further includes a limiting piece 34 and a limiting spring 35 located in the first groove 32. The limiting piece 34 is slidably connected in the first groove 32, and the limiting spring 35 is connected between the limiting piece 34 and the housing 31. When the engaging part 411 is placed in the first groove 32, it pushes the limiting piece 34 to compress the limiting spring 35, and the engaging part 411 can move to the second groove 33 and engage with the second groove 33 under the action of the limiting spring 35.

[0083] With this configuration, after the locking part 411 enters the first groove 32 via the limiting piece 34 and the limiting spring 35, the limiting spring 35 can drive the locking part 411 into the second groove 33, and can form a limiting locking on the locking part 411 in the second groove 33, preventing the locking part 411 from accidentally coming out of the second groove 33, thus increasing the stability of the limiting.

[0084] The limiting piece 34 is slidably connected inside the housing 31. The housing 31 can be provided with a sliding groove extending along the direction of the first groove 32 toward the second groove 33. The limiting piece 34 is provided with a sliding protrusion, which is slidably connected to the sliding groove, so that the limiting piece 34 can approach and move away from the second groove 33.

[0085] In the free state, the limiting spring 35 pushes the limiting piece 34 to the initial position, which is located in the first groove 32 near the second groove 33. When the engaging part 411 enters the first groove 32, the engaging part 411 first contacts and pushes the limiting piece 34, causing the limiting piece 34 to overcome the elastic force of the limiting spring 35 and move away from the second groove 33, and the limiting spring 35 accumulates elastic potential energy.

[0086] After the engaging portion 411 is fully inserted into the first groove 32, the limiting spring 35 applies a pushing force to the engaging portion 411 toward the second groove 33, causing the engaging portion 411 to move toward the second groove 33. The longitudinal length of the engaging portion 411 can be greater than the longitudinal length of the second groove 33, so that after the engaging portion 411 is engaged in the second groove 33, the limiting spring 35 is still in an elastic deformation state and applies an elastic force to the engaging portion 411, thereby restricting the engaging portion 411 from entering the first groove 32 from the second groove 33.

[0087] When releasing the latching part 411, the occupant can push the limiting piece 34 by hand to move the limiting piece 34 toward the first groove 32, thereby allowing the latching part 411 to move into the first groove 32.

[0088] Reference Figure 4 , Figure 5 , Figure 7 and Figures 10 to 12 As shown, in some embodiments, the seat headrest also includes a power supply base 42 and a flexible conductive element 43; the power supply base 42 is provided with at least one power supply interface 421 that can supply power to external devices, the power supply base 42 and the flexible conductive element 43 are both fixed on the constraint band 4, and the flexible conductive element 43 can be wound with the constraint band 4; the handle 41 is provided with an electrical connector 44, and the flexible conductive element 43 is electrically connected to the electrical connector 44 and the power supply base 42.

[0089] This configuration integrates a power supply base 42 and a flexible conductive element 43 on the restraint strap 4, and provides an electrical connector 44 on the handle 41, enabling the headrest to provide a power supply interface 421 for the occupant's external devices, thus expanding the headrest's functionality. Furthermore, it does not affect the normal winding of the restraint strap 4 when it is rolled up for storage.

[0090] External devices are everyday electrical appliances, such as heated eye masks and head massagers. The power supply base 42 is provided with at least one power supply interface 421 that can supply power to the external device. The power supply interface 421 can be a USB interface, or the power supply interface 421 can be two magnetic points on the power supply base 42, through which power is supplied to the external device.

[0091] The power supply base 42 is fixed to the constraint strap 4 and moves and winds together with the constraint strap 4. The fixing method can be that the bottom surface of the power supply base 42 is provided with a strap loop through which the constraint strap 4 passes, or the power supply base 42 and the constraint strap 4 are fixed by stitching.

[0092] The flexible conductive element 43 can be a flexible cable, a flexible printed circuit board, or a braided tape with wires. It extends along the length of the constraint tape 4 and has a certain degree of flexibility and bending resistance. The flexible conductive element 43 may have an insulating layer, or the constraint tape 4 may have at least two interlocking braided layers, with the flexible conductive element 43 disposed between the two braided layers of the constraint tape 4.

[0093] The handle 41 is provided with an electrical connector 44, which can be a metal contact, a contact piece, or a socket. The electrical connector 44 is electrically connected to an external power source, so that the external power source can supply power to the power supply base 42 through the electrical connector 44 and the flexible conductive member 43.

[0094] With the restraint strap 4 wound and stored, the flexible conductive element 43 is also wound onto the winding mechanism 2, and the power supply base 42 is located on the wound strap or placed in the first receiving groove 11. When the handle 41 is pulled out and fixed in the second position, the restraint strap 4 unfolds, and the power supply base 42 is exposed in an area accessible to the occupant, facilitating connection to external equipment. The electrical connector 44 is provided on the handle 41, facilitating electrical connection while limiting the movement.

[0095] Furthermore, in some embodiments, the limiting mechanism 3 is provided with a power supply component 36, and when the handle 41 is engaged with the limiting mechanism 3, the power supply component 36 is electrically connected to the electrical connector 44.

[0096] This configuration integrates the power supply component 36 onto the limiting mechanism 3, allowing the mechanical limiting and electrical connection between the handle 41 and the limiting mechanism 3 to be completed simultaneously. Furthermore, the power supply base 42 can only be electrically connected to the power supply component 36 to provide power when the restraint strap 4 is unfolded and fixed, thus improving the safety of electricity use.

[0097] When the handle 41 is engaged with the limiting mechanism 3, i.e., when the handle 41 is in the second position, the power supply component 36 and the electrical connector 44 achieve electrical connection while structurally engaging. The power supply component 36 can be configured as a flexible contact or a plug terminal, which makes contact with the corresponding contact of the electrical connector 44 to conduct electricity. Thus, the power supply circuit is only connected when the constraint band 4 is unfolded and locked, avoiding exposure or accidental activation of the power supply component 36 in the first position.

[0098] Reference Figures 10 to 12As shown, in some embodiments, the handle 41 is provided with a plug slot 45, the electrical connector 44 is disposed in the plug slot 45, and the power supply component 36 includes an electrical plug for connecting to an external power source; when the handle 41 cooperates with the limiting mechanism 3, the electrical plug is inserted into the plug slot 45 to electrically connect with the electrical connector 44.

[0099] This design, with the engagement of the plug slot 45 and the electrical plug, ensures reliable electrical connection. Furthermore, the engagement of the plug slot 45 and the electrical plug effectively protects the connection point, preventing water droplets and dust from entering.

[0100] The handle 41 is provided with a plug-in slot 45, and the electrical connector 44 is disposed inside the plug-in slot 45. The electrical connector 44 may be a metal terminal piece embedded in the plug-in slot 45, or a metal coil embedded in the plug-in slot 45.

[0101] Electrical plugs are made of conductive material and can be cylindrical or conical in shape. They connect to an external power source or the vehicle's electrical system, allowing the external or vehicle power supply to deliver electrical energy to the plug.

[0102] When the handle 41 is pushed toward the limiting mechanism 3 and engages with the limiting mechanism 3, the electrical plug is aligned with the insertion slot 45 and inserted, making contact with the metal coil in the insertion slot 45, so that the electrical plug can supply power to the power supply base 42 through the metal coil and the flexible conductive part 43.

[0103] The electrical plug is divided into two sections by an insulating ring, with the upper and lower sections representing the positive and negative terminals, respectively. The number of sections can be increased as needed to accommodate different electrical circuit requirements. The number of metal coils corresponds to the number of sections of the electrical plug, ensuring that each section of the electrical plug contacts a corresponding metal coil after being inserted into the socket 45.

[0104] The limiting mechanism 3 includes a housing 31. When the housing 31 is provided with a first groove 32 and a second groove 33, the electrical plug is disposed in the second groove 33 and extends toward the first groove 32. The engaging part 411 is provided with a insertion groove 45. After the engaging part 411 enters the first groove 32, the insertion groove 45 is disposed opposite to the second groove 33. Thus, during the process of the engaging part 411 entering the second groove 33, the electrical plug is simultaneously inserted into the insertion groove 45. When the engaging part 411 engages into the second groove 33, the electrical plug is inserted into the insertion groove 45, so that the electrical plug is electrically connected to the electrical connector 44.

[0105] Furthermore, in some embodiments, the constraint band 4 is provided with a plurality of mounting pieces 46 for connecting external devices, and at least two mounting pieces 46 are located on both sides of the power supply base 42 along the extension direction of the constraint band 4.

[0106] By configuring mounting pieces 46 on both sides of the power supply base 42 on the constraint band 4, it is convenient to fix external devices on the constraint band 4 and to position the external devices on the constraint band 4.

[0107] Mounting element 46 can be a Velcro, clip, or hook. Mounting element 46 can be attached to the constraint strap 4, or it can be set around the constraint strap 4 to mount the mounting element 46 onto the constraint strap 4.

[0108] At least two mounting pieces 46 are located on both sides of the power supply base 42 along the extension direction of the constraint band 4. The power supply base 42 has mounting pieces 46 on both sides of the extension direction of the constraint band 4, allowing the external device to be positioned opposite the power supply base 42 when connected to the two mounting pieces 46. This facilitates electrical connection between the external device and the power supply interface 421 of the power supply base 42.

[0109] Reference Figure 6 As shown, in some embodiments, the seat headrest also includes a guide plate 15, which is fixed to the headrest body 1 and located at the opening of the first receiving groove 11; the guide plate 15 is provided with a guide hole for the restraint belt 4 to pass through, and the size of the guide hole is smaller than the size of the handle 41.

[0110] With this configuration, the guide plate 15 can prevent the handle 41 from being rolled into the first receiving groove 11, ensuring that the handle 41 is always in a grippable state when stored, while guiding the entry and exit of the restraint band 4 to reduce wear.

[0111] The guide plate 15 can be made of smooth plastic or metal sheet and is fixed to the periphery of the groove opening of the first receiving groove 11 by adhesive or snap-fit. The guide plate 15 is provided with guide holes for the restraint band 4 to pass through. The guide holes are slit-shaped or rectangular holes, and their width matches the thickness and width of the restraint band 4, so that the restraint band 4 can slide smoothly in the guide holes.

[0112] Because the size of the guide hole is smaller than the size of the handle 41, when the handle 41 is in the first position, the handle 41 cannot pass through the guide hole under the elastic force of the elastic member 23, thus preventing the handle 41 from entering the first receiving groove 11. The guide piece 15 also guides the restraint band 4, preventing the restraint band 4 from rubbing against the headrest body 1 when moving.

[0113] When the headrest is in use, during normal driving, the handle 41 is in the first position, and most of the restraint strap 4 is wound and stored in the first receiving groove 11 by the winding mechanism 2. At least part of the handle 41 protrudes outside the opening of the first receiving groove 11 and is blocked by the guide piece 15 fixed at the opening.

[0114] When the occupant needs to use the headrest restraint function, they pinch the handle 41 protruding from the first receiving groove 11 with their fingers and pull it out in a direction away from the headrest. The pulling force is transmitted through the restraint band 4 to the winding part 21 of the winding mechanism 2, overcoming the elastic force of the elastic member 23 and causing the winding sleeve 211 to rotate.

[0115] As the reel sleeve 211 rotates, the reel sleeve 211 loosens the constraint band 4, which extends outward through the guide hole of the guide plate 15. The flexible conductive element 43 unfolds along with the constraint band 4, and the power supply base 42 and the mounting part 46 are brought out of the first receiving groove. During the pulling process, the first bearing seat 212 rotates relative to the first connecting member 221, and the second bearing seat 213 rotates relative to the second connecting member 222.

[0116] The occupant continues to pull the handle, so that the restraint strap is long enough to bypass the front surface of the support member 13 of the headrest body 1 and reach the position of the second receiving groove on the right side. The locking part 411 on the handle is inserted into the first groove 32 of the housing 31. During the insertion of the locking part 411, the limiting piece 34 is pushed to move away from the second groove 33.

[0117] After the engaging part 411 is fully inserted into the first groove 32, the limiting spring 35 pushes the limiting piece 34 to abut against the engaging part 411, causing the engaging part 411 to enter the second groove 33. The handle 41 switches to the second position, and the restraint strap 4 surrounds the headrest body 1, forming a restraint space with the front surface and sides of the headrest to restrict lateral movement of the head. When the occupant's head rests on the headrest, the restraint strap can prevent the head from sliding to the sides.

[0118] As the snap-fit ​​part 411 snaps into the second groove 33, the electrical plug is inserted into the pre-set insertion slot 45 on the handle 41, making contact with the metal coil, which serves as the electrical connector 44, within the slot, thus establishing electrical connection. Vehicle power is supplied to the power supply base 42 via the power supply component 36, the electrical connector 44, and the flexible conductive component 43. External devices can be electrically connected to the power supply interface 421 on the power supply base 42, thereby supplying power to external devices through the power supply base 42.

[0119] A second aspect of this application provides a seat, including a seat cushion 51, a backrest 52, and a headrest as described in any of the preceding claims, wherein the backrest 52 is connected to the seat cushion 51, and the headrest body 1 is connected to the backrest 52.

[0120] The seat cushion 51 is used to support the occupant's buttocks, and the backrest 52 is connected to the seat cushion 51 and can be angled around the pivot at the rear of the seat cushion 51. The top of the backrest 52 is provided with a headrest mounting hole or sleeve, and the support column extending from the skeleton member 12 of the headrest body 1 is inserted into the mounting hole, and the height of the headrest body 1 can be adjusted by a locking mechanism.

[0121] Applying the aforementioned headrest to the seat allows the seat to provide normal head protection and support while driving, and when the vehicle is parked and lying down to rest, the restraint strap 4 can provide lateral head restraint, improving the seat's rest adaptability, and the restraint strap 4 does not affect the overall appearance of the seat.

[0122] A third aspect of this application provides a vehicle, including a vehicle body 6 and a seat as described above.

[0123] The vehicle body 6 has a passenger compartment, and the seats are fixed inside the passenger compartment. After the headrest body 1 is installed on the backrest, the headrest winding mechanism 2, limiting mechanism 3, and restraint strap 4 are assembled into the vehicle body 6 along with the seat. When the vehicle is in motion, the headrest body 1 maintains its normal headrest function. When the vehicle is parked and the occupants need to rest, the restraint strap 4 can be used to create a head restraint space. The vehicle's own electrical system can be connected to the power interface under the seat via a wiring harness, and then extended from the seat wiring harness to the power supply component 36 of the limiting mechanism 3, ultimately providing power to the power supply base 42 on the headrest. In this way, the restraint strap 4 not only provides physical restraint but also constructs a power supply channel. This embodiment integrates the aforementioned seat headrest and seat into the overall configuration of the vehicle, enabling the vehicle to provide a more reliable head restraint solution for occupants during long-term parking waiting or rest, and also providing charging convenience. The vehicle assembly and wiring can utilize the existing seat wiring harness channel without creating additional obtrusive structures.

[0124] When a seat with the aforementioned headrest is used in a vehicle, the occupant can receive head restraint provided by restraint strap 4 when the vehicle is parked, reducing discomfort caused by lateral head slippage; the folded headrest does not compromise the integrity and aesthetics of the vehicle's interior.

[0125] It should be understood that the application of this application is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims. Those skilled in the art can understand that implementing all or part of the processes of the above embodiments and making equivalent changes according to the claims of this application still fall within the scope of this application.

Claims

1. A type of seat headrest, characterized in that, include: The headrest body (1) has a first receiving groove (11) and a second receiving groove on opposite sides; The winding mechanism (2) is fixed in the first receiving groove (11); The limiting mechanism (3) is fixed in the second receiving groove; The constraint strap (4) is connected to the winding mechanism (2) at one end and has a handle (41) at the other end. The handle (41) can be switched to a first position and a second position. When the handle (41) is in the first position, it is at least partially exposed outside the first receiving groove (11), and the restraint band (4) is wound and stored in the first receiving groove (11) by the winding mechanism (2). When the handle (41) is in the second position, it engages with the limiting mechanism (3) to limit the movement of the restraint strap (4) around the headrest body (1) to form a restraint space together with the headrest body (1).

2. The headrest according to claim 1, characterized in that, The winding mechanism (2) includes a winding part (21), a fixing part, and an elastic element (23). The fixing part is fixedly connected to the headrest body (1), the winding part (21) is rotatably disposed on the fixing part, and the elastic element (23) is connected between the winding part (21) and the fixing part; The end of the constraint band (4) is fixedly connected to the winding part (21), and the winding part (21) rotates relative to the fixed part to wind and loosen the constraint band (4). The elastic element (23) is configured to drive the winding portion (21) to wind the constraint band (4) by elastic potential energy and to position the handle (41) in the first position.

3. The headrest according to claim 2, characterized in that, The fixing part includes a first connector (221) and a second connector (222); The first connector (221) and the second connector (222) are rotatably connected to both ends of the winding part (21), and both the first connector (221) and the second connector (222) are fixedly connected to the headrest body (1); One end of the elastic member (23) is fixedly connected to the winding part (21), and the other end is fixedly connected to the first connector (221) or the second connector (222); The winding section (21) includes a winding sleeve (211), a first bearing seat (212), and a second bearing seat (213). The first bearing seat (212) and the second bearing seat (213) are respectively fixed to both ends of the roller sleeve (211), the first connecting piece (221) is rotatably connected to the first bearing seat (212), and the second connecting piece (222) is rotatably connected to the second bearing seat (213); The elastic element (23) is disposed inside the reel sleeve (211); One end of the elastic element (23) is connected to the second bearing seat (213) and the other end is connected to the first connector (221), or one end of the elastic element (23) is connected to the first bearing seat (212) and the other end is connected to the second connector (222).

4. The headrest according to any one of claims 1 to 3, characterized in that, The limiting mechanism (3) includes a housing (31), on which a first groove (32) and a second groove (33) are arranged longitudinally and communicate with each other. The handle (41) includes a snap-fit ​​part (411) which is connected to the restraint strap (4); The snap-fit ​​part (411) passes through the first groove (32) and snaps into the second groove (33).

5. The headrest according to claim 4, characterized in that, Both the first groove (32) and the second groove (33) are provided with slots that penetrate one side of the housing (31). The horizontal dimension of the slot of the second groove (33) is smaller than the horizontal dimension of the snap-fit ​​part (411). The snap-fit ​​part (411) is placed in the second groove (33) through the slot of the first groove (32) and snaps into the slot of the second groove (33). And / or, the limiting mechanism (3) further includes a limiting piece (34) and a limiting spring (35) located in the first groove (32). The limiting piece (34) is slidably connected in the first groove (32), and the limiting spring (35) is connected between the limiting piece (34) and the housing (31). When the snap-fit ​​part (411) is placed in the first groove (32), it pushes the limiting piece (34) to compress the limiting spring (35), and the snap-fit ​​part (411) can move to the second groove (33) under the action of the limiting spring (35) and snap-fit ​​with the second groove (33).

6. The headrest according to any one of claims 1 to 3, characterized in that, It also includes a power supply base (42) and a flexible conductive element (43); The power supply base (42) is provided with at least one power supply interface (421) that can supply power to external devices. The power supply base (42) and the flexible conductive element (43) are both fixed on the constraint band (4). The flexible conductive element (43) can be wound around the constraint band (4). The handle (41) is provided with an electrical connector (44), and the flexible conductive element (43) is electrically connected to the electrical connector (44) and the power supply base (42).

7. The headrest according to claim 6, characterized in that, The limiting mechanism (3) is provided with a power supply component (36). When the handle (41) is engaged with the limiting mechanism (3), the power supply component (36) is electrically connected to the electrical connector (44). And / or, the constraint band (4) is provided with a plurality of mounting pieces (46) for connecting the external device, and at least two of the mounting pieces (46) are located on both sides of the power supply base (42) along the extension direction of the constraint band (4).

8. The headrest according to any one of claims 1 to 3, characterized in that, The headrest body (1) includes a skeleton (12) and a support (13). A portion of the skeleton (12) is disposed within the support (13). The first receiving groove (11) and the second receiving groove are both disposed on the support (13) and located on both sides of the skeleton (12). The first receiving groove (11) and the second receiving groove both extend to the skeleton (12). Both the limiting mechanism (3) and the winding mechanism (2) are fixedly connected to the skeleton member (12).

9. A type of seat, characterized in that, It includes a seat cushion (51), a backrest (52) and a headrest as described in any one of claims 1 to 8, wherein the backrest (52) is connected to the seat cushion (51) and the headrest body (1) is connected to the backrest (52).

10. A vehicle, characterized in that, Includes the vehicle body (6) and the seat as described in claim 9.

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